有关于多重宇宙的警告吗？

Question

每次使用apt-get更新时，我都会收到以下警告

W: Skipping acquire of configured file 'multiverse//binary-amd64/Packages' as repository 'http://archive.ubuntu.com/ubuntu bionic-updates InRelease' doesn't have the component 'multiverse/' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'multiverse//i18n/Translation-en' as repository 'http://archive.ubuntu.com/ubuntu bionic-updates InRelease' doesn't have the component 'multiverse/' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'multiverse//cnf/Commands-amd64' as repository 'http://archive.ubuntu.com/ubuntu bionic-updates InRelease' doesn't have the component 'multiverse/' (component misspelt in sources.list?)

我不确定这是不是我该担心的事？我在谷歌上搜索了这些警告，但是找不到有相同警告的人，只有相同的警告。

在/etc/apt/sources.list中有什么：

deb http://archive.ubuntu.com/ubuntu bionic main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu bionic-security main universe restricted m$
deb http://archive.ubuntu.com/ubuntu bionic-updates main universe restricted mu$
deb https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/

第二个命令：cat /etc/apt/sources.list | grep multiverse：

deb http://archive.ubuntu.com/ubuntu bionic main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu bionic-security main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu bionic-updates main universe restricted multiverse/

Answer 1

删除仿生更新行中的/后置多体。

您可以在错误消息中看到错误的双斜杠。

multiverse**//**binary-amd64/Packages

然后再尝试sudo apt update。